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A dual-chambered microbial fuel cell (MFC) was studied to investigate the effect of anolyte pH on bioelectricity production using wastewater and river water as feedstocks.

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What they did

System
MFC

What worked

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Abstract

Finding sustainable alternative energy resources and treating wastewater are the two most important issues that need to be solved. Microbial fuel cell (MFC) technology has demonstrated a tremendous potential in bioelectricity generation with wastewater treatment. Since wastewater can be used as a source of electrolyte for the MFC, the salient point of this study was to investigate the effect of pH on bioelectricity production using various biomass feed (wastewater and river water) as the anolyte in a dual-chambered MFC. Maximum extents of power density (1459.02 mW·m⁻²), current density (1288.9 mA·m⁻²), and voltage (1132 mV) were obtained at pH 8 by using Bhairab river water as a feedstock in the MFC. A substantial extent of chemical oxygen demand (COD) removal (94%) as well as coulombic efficiency (41.7%) was also achieved in the same chamber at pH 8. The overall performance of the MFC, in terms of bioelectricity generation, COD removal, and coulombic efficiency, indicates a plausible utilization of the MFC for wastewater treatment as well as bioelectricity production.

Key findings

  • Maximum power density (1459.02 mW·m⁻²) was obtained at pH 8 using Bhairab river water as a feedstock.
  • A substantial extent of chemical oxygen demand (COD) removal (94%) was achieved at pH 8.
  • Coulombic efficiency (41.7%) was also achieved at pH 8.

Keywords

Microbial fuel cellWastewaterBiomass (ecology)Faraday efficiencyChemical oxygen demandPulp and paper industry

Identifiers

DOI
10.1155/2021/5465680
Journal
Journal of Chemistry
Year
2021